Add at_address() to etl::unaligned_type #536

Job	Run time
Syntax Check - Clang C++03 Linux No STL (ubuntu-22.04)	23s
Syntax Check - Clang C++03 Linux STL (ubuntu-22.04)	25s
Syntax Check - Clang C++11 Linux No STL (ubuntu-22.04)	37s
Syntax Check - Clang C++11 Linux No STL Force C++03 (ubuntu-22.04)	33s
Syntax Check - Clang C++11 Linux STL (ubuntu-22.04)	35s
Syntax Check - Clang C++11 Linux STL Force C++03 (ubuntu-22.04)	41s
Syntax Check - Clang C++14 Linux No STL (ubuntu-22.04)	36s
Syntax Check - Clang C++14 Linux No STL Force C++03 (ubuntu-22.04)	38s
Syntax Check - Clang C++14 Linux STL (ubuntu-22.04)	37s
Syntax Check - Clang C++14 Linux STL Force C++03 (ubuntu-22.04)	40s
Syntax Check - Clang C++17 Linux No STL (ubuntu-22.04)	43s
Syntax Check - Clang C++17 Linux No STL Force C++03 (ubuntu-22.04)	43s
Syntax Check - Clang C++17 Linux STL (ubuntu-22.04)	51s
Syntax Check - Clang C++17 Linux STL Force C++03 (ubuntu-22.04)	52s
Syntax Check - Clang C++20 Linux No STL (ubuntu-22.04)	1m 4s
Syntax Check - Clang C++20 Linux STL (ubuntu-22.04)	1m 14s
Syntax Check - Clang C++20 Linux No STL Force C++03 (ubuntu-22.04)	1m 4s
Syntax Check - Clang C++20 Linux STL Force C++03 (ubuntu-22.04)	1m 14s
	13m 30s

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